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adv. 意外地
形容词：accidental
However, you accidentally deleted one of his files.
不小心删掉了他一个文件。
She accidentally erased the tape.
她意外地抹去了录了音的磁带。
I accidentally spilled the coffee.
我不小心把咖啡洒了。
adv.意外地；偶然地
unexpectedly
fortuitously
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